Walk doesn't traverse with clause

[yilinjuang]

Since withClause has type WithClause and walk only handles Node type, the entire withClause is skipped.

https://github.com/launchql/pgsql-parser/blob/7e4343a796a48a61b3272654c3a05af3b3f9514a/packages/traverse/src/17/runtime-schema.ts#L8514-L8519

https://github.com/launchql/pgsql-parser/blob/7e4343a796a48a61b3272654c3a05af3b3f9514a/packages/traverse/src/traverse.ts#L72-L83

Same issue applies to union larg and rarg.

Expected behavior

Walk should traverse with clause and union.

Actual behavior

Walk skips with clause and union.

[pyramation]

thank you! Super happy to take a PR for this :)

[pyramation]

#233

[pyramation]

@yilinjuang pardon the delay, thanks for being patient :)